package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对前端传过来的明文密码进行md5加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    //新增员工
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 将EmployeeDTO(属性多)对象转换为Employee对象(属性少)
        // 对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        // 设置账号的状态, 默认正常状态 1表示正常 0 表示禁用
        employee.setStatus(StatusConstant.ENABLE);
        // 设置密码, 默认为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        // 设置当前记录的创建时间和修改时间
        // employee.setCreateTime(LocalDateTime.now());
        // employee.setUpdateTime(LocalDateTime.now());
        // 设置当前记录创建人id和修改人id
        // TODO 后期需要修改为登录用户的id
        // employee.setCreateUser(BaseContext.getCurrentId());
        // employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);
    }

    // 员工分页查询
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO){
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
        return new PageResult(total,result);
    }

    //启用禁用员工账号
    public void startOrStop(Integer status, Long id) {
        // 还是类似于写一个sql : update employee set status = ？ where id = ？
        // 扩展这个方法
        Employee employee = Employee.builder().status(status).id(id).build();
        employeeMapper.update(employee);
    }

    //根据id查询员工信息

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("******");
        return employee;
    }

    // 编辑员工信息
    @Override
    public void update(EmployeeDTO employeeDTO) {
       // 实体属性不等 -> 对象的属性拷贝
       Employee employee = new Employee();
       BeanUtils.copyProperties(employeeDTO, employee);


       // 时间和id
        // employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }
}
